[API] Delete obsolete functions

buildSrc/src/main/groovy/imgui/generate/GenerateLibs.groovy

@@ -47,10 +47,13 @@ class GenerateLibs extends DefaultTask {
                 spec.from(project.rootProject.file('include/imgui/misc/freetype')) { CopySpec it -> it.include('*.h', '*.cpp') }
             }
 
-            spec.from(project.rootProject.file('imgui-binding/src/main/native'))
             spec.into(jniDir)
         }
 
+        project.copy {CopySpec spec ->
+            spec.from(project.rootProject.file('imgui-binding/src/main/native')).into(jniDir)
+        }
+
         // Generate platform dependant ant configs and header files
         def buildConfig = new BuildConfig('imgui-java', tmpFolder, libsFolder, jniDir)
         def buildTargets = [] as BuildTarget[]