Remove dx9 shader compilation option

Bumps the submodules group with 3 updates: [bgfx](https://github.com/bkaradzic/bgfx), [bx](https://github.com/bkaradzic/bx) and [bimg](https://github.com/bkaradzic/bimg).


Updates `bgfx` from `66b020e` to `5de37d0`
- [Commits](66b020e939...5de37d0e22)

Updates `bx` from `610b8e4` to `be3e348`
- [Commits](610b8e4df1...be3e348eb2)

Updates `bimg` from `dce2c35` to `6c4d188`
- [Commits](dce2c35a49...6c4d1888eb)

---
updated-dependencies:
- dependency-name: bgfx
  dependency-type: direct:production
  dependency-group: submodules
- dependency-name: bx
  dependency-type: direct:production
  dependency-group: submodules
- dependency-name: bimg
  dependency-type: direct:production
  dependency-group: submodules
...

Signed-off-by: dependabot[bot] <support@github.com>

cmake/bgfx/examples.cmake

@@ -33,19 +33,6 @@ function(add_bgfx_shader FILE FOLDER)
 		set(OUTPUTS_PRETTY "")
 
 		if(WIN32)
-			# dx9
-			if(NOT "${TYPE}" STREQUAL "COMPUTE")
-				set(DX9_OUTPUT ${BGFX_DIR}/examples/runtime/shaders/dx9/${FILENAME}.bin)
-				_bgfx_shaderc_parse(
-					DX9 ${COMMON} WINDOWS
-					PROFILE s_3_0
-					O 3
-					OUTPUT ${DX9_OUTPUT}
-				)
-				list(APPEND OUTPUTS "DX9")
-				set(OUTPUTS_PRETTY "${OUTPUTS_PRETTY}DX9, ")
-			endif()
-
 			# dx11
 			set(DX11_OUTPUT ${BGFX_DIR}/examples/runtime/shaders/dx11/${FILENAME}.bin)
 			if(NOT "${TYPE}" STREQUAL "COMPUTE")

cmake/bgfx/generated/shader.cpp.in

@@ -1,4 +1,3 @@
 #include "@BGFX_DIR@/src/shader.cpp"
-#include "@BGFX_DIR@/src/shader_dx9bc.cpp"
 #include "@BGFX_DIR@/src/shader_dxbc.cpp"
-#include "@BGFX_DIR@/src/shader_spirv.cpp"
+#include "@BGFX_DIR@/src/shader_spirv.cpp"

cmake/bgfxToolUtils.cmake

@@ -581,16 +581,8 @@ if(TARGET bgfx::shaderc)
 			OR CYGWIN
 		)
 			set(PLATFORM WINDOWS)
-			if(ARGS_TYPE STREQUAL "VERTEX" OR ARGS_TYPE STREQUAL "FRAGMENT")
-				list(APPEND PROFILES s_3_0)
-				list(APPEND PROFILES s_4_0)
-				list(APPEND PROFILES s_5_0)
-			elseif(ARGS_TYPE STREQUAL "COMPUTE")
-				list(APPEND PROFILES s_4_0)
-				list(APPEND PROFILES s_5_0)
-			else()
-				message(error "shaderc: Unsupported type")
-			endif()
+			list(APPEND PROFILES s_4_0)
+			list(APPEND PROFILES s_5_0)
 		else()
 			message(error "shaderc: Unsupported platform")
 		endif()