Do not need Windows specific template anymore

clang compiler is now supported on Windows, so
no need for separate Windows template.
diff --git a/build-android/gradle-templates/win.template.gradle b/build-android/gradle-templates/win.template.gradle
deleted file mode 100644
index 07596af..0000000
--- a/build-android/gradle-templates/win.template.gradle
+++ /dev/null
@@ -1,76 +0,0 @@
-// this template is for windows platform to build

-//   need gcc, could not use clang

-//   disable -Werror compile flag

-// This is temp workaround, clean fix will be provided soon so all OSes should use

-// common.gradle

-

-apply plugin: 'com.android.model.native'

-

-Properties properties = new Properties()

-properties.load(project.rootProject.file('local.properties').newDataInputStream())

-def ndkDir = properties.getProperty('ndk.dir')

-

-model {

-    android {

-        compileSdkVersion = 23

-        buildToolsVersion = "23.0.2"

-

-        defaultConfig.with {

-            minSdkVersion.apiLevel = 22

-            targetSdkVersion.apiLevel = 24

-            versionCode = 1

-            versionName = "0.0.1"

-        }

-    }

-

-    android.ndk {

-        moduleName = "VkLayer_${project.name}"

-        toolchain = "gcc"

-        stl = "gnustl_static"

-        ldLibs.addAll(["log", "android"])

-        cppFlags.addAll(["-std=c++11", "-DVK_PROTOTYPES", "-Wall",

-                         "-Wno-unused-function", "-Wno-unused-const-variable",

-                         "-DVK_USE_PLATFORM_ANDROID_KHR"])

-        cppFlags.addAll(["-I${file("../../../../layers")}".toString(),

-                         "-I${file("../../../../include")}".toString(),

-                         "-I${file("../../../../loader")}".toString(),

-                         "-I${file("../../include")}".toString(),

-                         "-I${file("../../../../external/glslang")}".toString()])

-    }

-

-    // Turn on hard float support in armeabi-v7a

-    android.abis {

-        create("armeabi-v7a") {

-            cppFlags.addAll(["-mhard-float", "-D_NDK_MATH_NO_SOFTFP=1", "-mfloat-abi=hard"])

-            ldLibs.add("m_hard")

-            ldFlags.add("-Wl,--no-warn-mismatch")

-        }

-    }

-

-    android.sources {

-        main {

-            jni {

-                source {

-                    srcDir "../../layer-src/${project.name}"

-                    srcDir '../../common'

-

-                }

-            }

-        }

-    }

-

-    android.buildTypes {

-        release {

-            ndk.with {

-                debuggable = true

-            }

-            minifyEnabled = false

-        }

-    }

-    android.productFlavors {

-        create ("all") {

-            ndk.abiFilters.addAll(["armeabi-v7a", 'arm64-v8a',

-                                   'x86', 'x86_64'])

-        }

-    }

-}