Disabling local shadows on mobile until we can get keyword stripping

ScriptableRenderPipeline/LightweightPipeline/LWRP/ShaderLibrary/Shadows.hlsl

 // TODO: We can't add more keywords to standard shaders. For now we use
 // same _SHADOWS_ENABLED keywords for local lights. In the future we can use
 // _LOCAL_SHADOWS_ENABLED keyword
+// For now disabling local shadows on mobile until we can get the keyword stripping
-#if defined(NO_SHADOWS) || !defined(_SHADOWS_ENABLED)
+#if defined(NO_SHADOWS) || !defined(_SHADOWS_ENABLED) || defined(SHADER_API_MOBILE)
     return 1.0h;
 #else
     float4 shadowCoord = mul(_LocalWorldToShadowAtlas[lightIndex], float4(positionWS, 1.0));