remove null check as its done already

Author: wing328

modules/openapi-generator/src/main/resources/kotlin-client/libraries/jvm-ktor/api.mustache

@@ -69,10 +69,10 @@ import com.fasterxml.jackson.databind.ObjectMapper
                         {{^isArray}}
                         {{^isString}}
                         {{^isNumber}}
-                        {{{paramName}}}?.apply { append("{{{baseName}}}", {{{paramName}}}?.toString()) }
+                        {{{paramName}}}?.apply { append("{{{baseName}}}", {{{paramName}}}.toString()) }
                         {{/isNumber}}
                         {{#isNumber}}
-                        {{{paramName}}}?.apply { append("{{{baseName}}}", {{{paramName}}}?.toString()) }
+                        {{{paramName}}}?.apply { append("{{{baseName}}}", {{{paramName}}}.toString()) }
                         {{/isNumber}}
                         {{/isString}}
                         {{#isString}}
@@ -98,10 +98,10 @@ import com.fasterxml.jackson.databind.ObjectMapper
                         {{^isArray}}
                         {{^isString}}
                         {{^isNumber}}
-                        {{{paramName}}}?.apply { it.append("{{{baseName}}}", {{{paramName}}}?.toString()) }
+                        {{{paramName}}}?.apply { it.append("{{{baseName}}}", {{{paramName}}}.toString()) }
                         {{/isNumber}}
                         {{#isNumber}}
-                        {{{paramName}}}?.apply { it.append("{{{baseName}}}", {{{paramName}}}?.toString()) }
+                        {{{paramName}}}?.apply { it.append("{{{baseName}}}", {{{paramName}}}.toString()) }
                         {{/isNumber}}
                         {{/isString}}
                         {{#isString}}

samples/client/petstore/kotlin-jvm-ktor-gson/src/main/kotlin/org/openapitools/client/apis/FakeApi.kt

@@ -87,8 +87,8 @@ import java.text.DateFormat
             val localVariableBody = 
                         ParametersBuilder().also {
                         name?.apply { it.append("name", name) }
-                        status?.apply { it.append("status", status?.toString()) }
-                        status2?.apply { it.append("status2", status2?.toString()) }
+                        status?.apply { it.append("status", status.toString()) }
+                        status2?.apply { it.append("status2", status2.toString()) }
                         }.build()
 
             val localVariableQuery = mutableMapOf<String, List<String>>()