patch: remove obsolete opus patch

patch/opus-fix-cmake.diff

@@ -1,26 +0,0 @@
---- /dev/null
-+++ a/opus_buildtype.cmake
-@@ -0,0 +1,23 @@
-+# Set a default build type if none was specified
-+
-+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
-+  if(CMAKE_C_FLAGS)
-+    message(STATUS "CMAKE_C_FLAGS: " ${CMAKE_C_FLAGS})
-+  else()
-+    set(default_build_type "Release")
-+    message(
-+      STATUS
-+        "Setting build type to '${default_build_type}' as none was specified and no CFLAGS was exported."
-+      )
-+    set(CMAKE_BUILD_TYPE "${default_build_type}"
-+        CACHE STRING "Choose the type of build."
-+        FORCE)
-+    # Set the possible values of build type for cmake-gui
-+    set_property(CACHE CMAKE_BUILD_TYPE
-+                 PROPERTY STRINGS
-+                          "Debug"
-+                          "Release"
-+                          "MinSizeRel"
-+                          "RelWithDebInfo")
-+  endif()
-+endif()