refactor(renderer): remove unnecessary methods and dependencies

Removed unused methods and deprecated dependencies from LLMInlayRenderer and LLMInlayManagerImpl. Simplified condition check in LLMInlayManagerImpl to use type check directly instead of class name string matching. Replaced StringUtils usage with Kotlin standard library function.

Author: phodal

src/main/kotlin/com/intellij/temporary/inlay/codecomplete/LLMInlayManagerImpl.kt

@@ -6,7 +6,6 @@ import cc.unitmesh.devti.util.parser.Code
 import cc.unitmesh.devti.util.parser.PostCodeProcessor
 import com.intellij.injected.editor.EditorWindow
 import com.intellij.openapi.Disposable
-import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.command.WriteCommandAction
 import com.intellij.openapi.diagnostic.logger
 import com.intellij.openapi.editor.Editor
@@ -15,7 +14,6 @@ import com.intellij.openapi.editor.Inlay
 import com.intellij.openapi.editor.ex.EditorEx
 import com.intellij.openapi.editor.impl.ImaginaryEditor
 import com.intellij.openapi.editor.impl.InlayModelImpl
-import com.intellij.openapi.fileEditor.FileDocumentSynchronizationVetoer
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.util.Disposer
 import com.intellij.openapi.util.Key
@@ -136,9 +134,7 @@ class LLMInlayManagerImpl : LLMInlayManager {
         val inlays = collectInlays(editor, tabRange.startOffset, tabRange.endOffset)
         if (inlays.isEmpty()) return 0
 
-        val completionCount = inlays.count {
-            it.getInlay()?.renderer?.javaClass?.name?.contains("LLMInlayRenderer") ?: false
-        }
+        val completionCount = inlays.count { it.getInlay()?.renderer is LLMInlayRenderer }
 
         if (completionCount > 0) {
             logger.debug("Completion inlays found: $completionCount")

src/main/kotlin/com/intellij/temporary/inlay/codecomplete/presentation/LLMInlayRenderer.kt

@@ -5,38 +5,22 @@ import com.intellij.openapi.editor.EditorCustomElementRenderer
 import com.intellij.openapi.editor.Inlay
 import com.intellij.openapi.editor.markup.TextAttributes
 import com.intellij.temporary.inlay.presentation.LLMTextInlayPainter
-import org.apache.commons.lang.StringUtils
 import org.jetbrains.annotations.NonNls
 import java.awt.Graphics
 import java.awt.Rectangle
 
 class LLMInlayRenderer(editor: Editor, lines: List<String?>) : EditorCustomElementRenderer {
     private val lines: List<String>
     private val content: String
-    fun setCachedWidth(cachedWidth: Int) {
-        this.cachedWidth = cachedWidth
-    }
+    private var cachedWidth = -1
+    private var cachedHeight = -1
 
     private val textAttributes: TextAttributes
     private var inlay: Inlay<EditorCustomElementRenderer>? = null
-    fun setCachedHeight(cachedHeight: Int) {
-        this.cachedHeight = cachedHeight
-    }
-
-    fun getLines(): List<String> {
-        return lines
-    }
-
-    fun getContent(): String {
-        return content
-    }
-
-    private var cachedWidth = -1
-    private var cachedHeight = -1
 
     init {
         this.lines = PresentationUtil.replaceLeadingTabs(lines, 4)
-        content = StringUtils.join(lines, "\n")
+        content = lines.joinToString("\n")
         textAttributes = PresentationUtil.getTextAttributes(editor)
     }
 
@@ -48,10 +32,6 @@ class LLMInlayRenderer(editor: Editor, lines: List<String?>) : EditorCustomEleme
         this.inlay = inlay
     }
 
-    fun getContentLines(): List<String> {
-        return lines
-    }
-
     override fun getContextMenuGroupId(inlay: Inlay<*>): @NonNls String {
         return "copilot.inlayContextMenu"
     }