Removed unused EngineJson.cmake file (#4107)

Signed-off-by: lumberyard-employee-dm <56135373+lumberyard-employee-dm@users.noreply.github.com>

cmake/EngineJson.cmake

@@ -1,45 +0,0 @@
-#
-# Copyright (c) Contributors to the Open 3D Engine Project.
-# For complete copyright and license terms please see the LICENSE at the root of this distribution.
-#
-# SPDX-License-Identifier: Apache-2.0 OR MIT
-#
-#
-# This file is copied during engine registration. Edits to this file will be lost next
-# time a registration happens.
-
-include_guard()
-
-set(LY_EXTERNAL_SUBDIRS "" CACHE STRING "Additional list of subdirectory to recurse into via the cmake `add_subdirectory()` command. \
-    The subdirectories are included after the restricted platform folders have been visited by a call to `add_subdirectory(restricted/\${restricted_platform})`")
-
-#! read_engine_external_subdirs
-# Read the external subdirectories from the engine.json file
-# External subdirectories are any folders with CMakeLists.txt in them
-# This could be regular subdirectories, Gems(contains an additional gem.json),
-# Restricted folders(contains an additional restricted.json), etc...
-# \arg:output_external_subdirs name of output variable to store external subdirectories into
-function(read_engine_external_subdirs output_external_subdirs)
-    ly_file_read(${LY_ROOT_FOLDER}/engine.json engine_json_data)
-    string(JSON external_subdirs_count ERROR_VARIABLE engine_json_error
-        LENGTH ${engine_json_data} "external_subdirectories")
-    if(engine_json_error)
-        message(FATAL_ERROR "Error querying number of elements in JSON array \"external_subdirectories\": ${engine_json_error}")
-    endif()
-
-    if(external_subdirs_count GREATER 0)
-        math(EXPR external_subdir_range "${external_subdirs_count}-1")
-        # Convert the paths the relative paths to absolute paths using the engine root
-        # as the base directory
-        foreach(external_subdir_index RANGE ${external_subdir_range})
-            string(JSON external_subdir ERROR_VARIABLE engine_json_error
-                GET ${engine_json_data} "external_subdirectories" "${external_subdir_index}")
-            if(engine_json_error)
-                message(FATAL_ERROR "Error reading field at index ${external_subdir_index} in \"external_subdirectories\" JSON array: ${engine_json_error}")
-            endif()
-            file(REAL_PATH ${external_subdir} real_external_subdir BASE_DIRECTORY ${CMAKE_SOURCE_DIR})
-            list(APPEND external_subdirs ${real_external_subdir})
-        endforeach()
-    endif()
-    set(${output_external_subdirs} ${external_subdirs} PARENT_SCOPE)
-endfunction()

cmake/cmake_files.cmake

@@ -15,7 +15,6 @@ set(FILES
     Configurations.cmake
     Dependencies.cmake
     Deployment.cmake
-    EngineJson.cmake
     FileUtil.cmake
     Findo3de.cmake
     Gems.cmake
@@ -28,6 +27,7 @@ set(FILES
     LYPython.cmake
     LYWrappers.cmake
     Monolithic.cmake
+    O3DEJson.cmake
     OutputDirectory.cmake
     Packaging.cmake
     PAL.cmake