refactor(amazonq): remove unused metric aws#933

## Problem

`codeTransformStartSrcComponents` is not used anywhere, and `result` /
`reason` are a part of every metric by default, so they don't need to be
manually included.

## Solution

Remove them.

Author: dhasani23

telemetry/definitions/commonDefinitions.json

@@ -440,16 +440,6 @@
             "type": "string",
             "description": "Represents the IDE session from which users start the transformation process"
         },
-        {
-            "name": "codeTransformStartSrcComponents",
-            "type": "string",
-            "description": "Names of components that can start a transformation",
-            "allowedValues": [
-                "devToolsStartButton",
-                "bottomPanelSideNavButton",
-                "chatPrompt"
-            ]
-        },
         {
             "name": "codeTransformStatus",
             "type": "string",
@@ -3847,14 +3837,6 @@
                 {
                     "type": "codeTransformTotalByteSize",
                     "required": true
-                },
-                {
-                    "type": "reason",
-                    "required": false
-                },
-                {
-                    "type": "result",
-                    "required": true
                 }
             ]
         },
@@ -3873,14 +3855,6 @@
                 {
                     "type": "codeTransformSessionId",
                     "required": true
-                },
-                {
-                    "type": "reason",
-                    "required": false
-                },
-                {
-                    "type": "result",
-                    "required": false
                 }
             ]
         },
@@ -3895,14 +3869,6 @@
                 {
                     "type": "credentialSourceId",
                     "required": false
-                },
-                {
-                    "type": "reason",
-                    "required": false
-                },
-                {
-                    "type": "result",
-                    "required": true
                 }
             ]
         },
@@ -3912,7 +3878,7 @@
             "metadata": [
                 {
                     "type": "codeTransformCancelSrcComponents",
-                    "required": true
+                    "required": false
                 },
                 {
                     "type": "codeTransformRuntimeError",
@@ -4006,14 +3972,6 @@
                     "type": "credentialSourceId",
                     "required": false
                 },
-                {
-                    "type": "reason",
-                    "required": false
-                },
-                {
-                    "type": "result",
-                    "required": false
-                },
                 {
                     "type": "source",
                     "required": false
@@ -4054,14 +4012,6 @@
                 {
                     "type": "codeTransformSessionId",
                     "required": true
-                },
-                {
-                    "type": "reason",
-                    "required": false
-                },
-                {
-                    "type": "result",
-                    "required": true
                 }
             ]
         },
@@ -4077,10 +4027,6 @@
                 {
                     "type": "codeTransformSessionId",
                     "required": true
-                },
-                {
-                    "type": "reason",
-                    "required": true
                 }
             ]
         },
@@ -4104,14 +4050,6 @@
                     "type": "codeTransformSessionId",
                     "required": true
                 },
-                {
-                    "type": "reason",
-                    "required": false
-                },
-                {
-                    "type": "result",
-                    "required": true
-                },
                 {
                     "type": "source",
                     "required": false
@@ -4180,14 +4118,6 @@
                 {
                     "type": "codeTransformTotalByteSize",
                     "required": true
-                },
-                {
-                    "type": "reason",
-                    "required": false
-                },
-                {
-                    "type": "result",
-                    "required": true
                 }
             ]
         },
@@ -4218,14 +4148,6 @@
                 {
                     "type": "codeTransformSessionId",
                     "required": true
-                },
-                {
-                    "type": "reason",
-                    "required": false
-                },
-                {
-                    "type": "result",
-                    "required": true
                 }
             ]
         },
@@ -4253,14 +4175,6 @@
                     "type": "codeTransformVCSViewerSrcComponents",
                     "required": true
                 },
-                {
-                    "type": "reason",
-                    "required": false
-                },
-                {
-                    "type": "result",
-                    "required": true
-                },
                 {
                     "type": "userChoice",
                     "required": false