Remove learnMode property from claude-code-settings schema (SchemaStore#4964)

- Remove learnMode property definition from main schema file
- Remove learnMode usage from test configuration file
- Remove learnMode from negative test file
- All schema validation and formatting checks pass

Author: jamesmazur

src/negative_test/claude-code-settings/wrong-property-types.json

@@ -2,7 +2,6 @@
   "cleanupPeriodDays": "thirty",
   "enableAllProjectMcpServers": 1,
   "includeCoAuthoredBy": "yes",
-  "learnMode": "true",
   "permissions": {
     "additionalDirectories": "should be array",
     "allow": "should be array"

src/schemas/json/claude-code-settings.json

@@ -191,10 +191,6 @@
         }
       }
     },
-    "learnMode": {
-      "type": "boolean",
-      "description": "Request the model focuses more on educating and co-creating with the user, rather than just completing tasks"
-    },
     "forceLoginMethod": {
       "type": "string",
       "description": "Force a specific login method, and skip the login method selection screen",

src/test/claude-code-settings/modern-complete-config.json

@@ -36,7 +36,6 @@
     ]
   },
   "includeCoAuthoredBy": true,
-  "learnMode": true,
   "permissions": {
     "additionalDirectories": ["~/Documents/reference", "~/.config/claude-code"],
     "allow": [