layers: Remove unneeded include from vk_enum_string_helper.h

Author: jeremyg-lunarg

layers/generated/vk_enum_string_helper.h

@@ -37,7 +37,6 @@
 
 #include <string>
 #include <vulkan/vulkan.h>
-#include "vk_layer_data.h"
 
 
 static inline const char* string_VkResult(VkResult input_value)

scripts/helper_file_generator.py

@@ -644,7 +644,6 @@ def GenerateEnumStringHelperHeader(self):
             enum_string_helper_header += '\n'
             enum_string_helper_header += '#include <string>\n'
             enum_string_helper_header += '#include <vulkan/vulkan.h>\n'
-            enum_string_helper_header += '#include "vk_layer_data.h"\n'
             enum_string_helper_header += '\n'
             enum_string_helper_header += self.enum_output
             enum_string_helper_header += self.DeIndexPhysDevFeatures()