refactor(vscode): drop unreachable postprocessing branches

postprocessCompletion contained model-specific branches for qwen3, granite,
gemini and gemma — models that are never selected. Keep the Codestral and
Mercury branches (both are user-selectable via kilo-code.new.autocomplete.model)
and also collapse Mercury's two adjacent branches into one block.

packages/kilo-vscode/src/services/autocomplete/classic-auto-complete/__tests__/uselessSuggestionFilter.test.ts

@@ -42,25 +42,15 @@ describe("postprocessAutocompleteSuggestion", () => {
       expect(result).toBe("test")
     })
 
-    it("handles Mercury/Granite prefix duplication", () => {
+    it("handles Mercury prefix duplication", () => {
       const result = postprocessAutocompleteSuggestion({
         suggestion: "const x = 42",
         prefix: "const x = ",
         suffix: "",
-        model: "granite-20b",
+        model: "inception/mercury-edit",
       })
       expect(result).toBe("42")
     })
-
-    it("handles Gemini/Gemma file separator", () => {
-      const result = postprocessAutocompleteSuggestion({
-        suggestion: "const x = 1<|file_separator|>",
-        prefix: "",
-        suffix: "",
-        model: "gemini-pro",
-      })
-      expect(result).toBe("const x = 1")
-    })
   })
 
   describe("extreme repetition filtering", () => {

packages/kilo-vscode/src/services/autocomplete/classic-auto-complete/uselessSuggestionFilter.ts

@@ -133,7 +133,7 @@ function normalizeToCompleteLine(params: AutocompleteSuggestion): AutocompleteSu
  * @param params.suggestion - The suggested text to insert
  * @param params.prefix - The text before the cursor position
  * @param params.suffix - The text after the cursor position
- * @param params.model - The model string (e.g., "codestral", "qwen3", etc.)
+ * @param params.model - The model string (e.g., "codestral", "mercury", etc.)
  * @param params.languageId - Optional language ID for language-specific filtering
  * @returns The processed suggestion text, or undefined if it should be filtered out
  */

packages/kilo-vscode/src/services/autocomplete/continuedev/core/autocomplete/postprocessing/index.ts

@@ -133,34 +133,18 @@ export function postprocessCompletion({
     }
   }
 
-  if (llm.model.includes("qwen3")) {
-    // Qwen3 always starts from special thinking markers, and we don't want them to output these contents
-    // Remove all content from "
-    completion = completion.replace(/<think>.*?<\/think>/s, "")
-    completion = completion.replace(/<\/think>/, "")
-
-    // Remove any number of newline characters at the beginning and end
-    completion = completion.replace(/^\n+|\n+$/g, "")
-  }
-
-  if (llm.model.includes("mercury") || llm.model.includes("granite")) {
+  if (llm.model.includes("mercury")) {
     completion = removePrefixOverlap(completion, prefix)
-  }
 
-  // // If completion starts with multiple whitespaces, but the cursor is at the end of the line
-  // // then it should probably be on a new line
-  if (
-    llm.model.includes("mercury") &&
-    (completion.startsWith("  ") || completion.startsWith("\t")) &&
-    !prefix.endsWith("\n") &&
-    (suffix.startsWith("\n") || suffix.trim().length === 0)
-  ) {
-    completion = "\n" + completion
-  }
-
-  if ((llm.model.includes("gemini") || llm.model.includes("gemma")) && completion.endsWith("<|file_separator|>")) {
-    // "<|file_separator|>" is 18 characters long
-    completion = completion.slice(0, -18)
+    // If completion starts with multiple whitespaces, but the cursor is at the
+    // end of the line then it should probably be on a new line
+    if (
+      (completion.startsWith("  ") || completion.startsWith("\t")) &&
+      !prefix.endsWith("\n") &&
+      (suffix.startsWith("\n") || suffix.trim().length === 0)
+    ) {
+      completion = "\n" + completion
+    }
   }
 
   // If prefix ends with space and so does completion, then remove the space from completion