8339309: unused-variable warnings happen in libfontmanager

Reviewed-by: prr

Author: YaSuenag

src/java.desktop/share/native/libfontmanager/HBShaper_Panama.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -97,7 +97,6 @@ JDKEXPORT void jdk_hb_shape(
      float devScale = 1.0f;
      if (getenv("HB_NODEVTX") != NULL) {
          float xPtSize = euclidianDistance(matrix[0], matrix[1]);
-         float yPtSize = euclidianDistance(matrix[2], matrix[3]);
          devScale = xPtSize / ptSize;
      }
 

src/java.desktop/share/native/libfontmanager/freetypeScaler.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2007, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2007, 2024, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -513,8 +513,6 @@ Java_sun_font_FreetypeFontScaler_createScalerContextNative(
     double dmat[4], ptsz;
     FTScalerContext *context =
             (FTScalerContext*) calloc(1, sizeof(FTScalerContext));
-    FTScalerInfo *scalerInfo =
-             (FTScalerInfo*) jlong_to_ptr(pScaler);
 
     if (context == NULL) {
         free(context);
@@ -1652,7 +1650,6 @@ Java_sun_font_FreetypeFontScaler_getGlyphPointNative(
         jlong pScaler, jint glyphCode, jint pointNumber) {
 
     FT_Outline* outline;
-    jobject point = NULL;
     jfloat x=0, y=0;
     FTScalerContext *context =
          (FTScalerContext*) jlong_to_ptr(pScalerContext);

src/java.desktop/unix/native/libfontmanager/X11FontScaler.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2024, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -267,7 +267,6 @@ Java_sun_font_NativeFont_getGlyphAdvance
         xcs = AWTFontPerChar(xFont, glyphCode - context->minGlyph);
         advance = AWTCharAdvance(xcs);
     } else {
-        int direction, ascent, descent;
         AWTChar2b xChar;
 
         xChar.byte1 = (unsigned char) (glyphCode >> 8);