Deprecate TechniqueDef.isUsingShaders(). Do not use it anywhere in the engine.

jme3-core/src/tools/java/jme3tools/shadercheck/ShaderCheck.java

@@ -36,7 +36,6 @@ public class ShaderCheck {
     private static void checkMatDef(String matdefName){
         MaterialDef def = (MaterialDef) assetManager.loadAsset(matdefName);
         for (TechniqueDef techDef : def.getDefaultTechniques()){
-            if (techDef.isUsingShaders()){
             DefineList dl = new DefineList();
             dl.addFrom(techDef.getShaderPresetDefines());
             ShaderKey shaderKey = new ShaderKey(techDef.getVertexShaderName(),
@@ -55,7 +54,6 @@ public class ShaderCheck {
             }
         }
     }
-    }
           
     public static void main(String[] args){
         Logger.getLogger(MaterialDef.class.getName()).setLevel(Level.OFF);