Removed the MAGNUM_BUILD_MULTITHREADED macro deprecated in 2019.10.

doc/changelog.dox

@@ -1745,6 +1745,9 @@ See also:
     -   @cpp TextureTools::distanceField() @ce, use the
         @ref TextureTools::DistanceFieldGL class instead.
 -   Removed APIs deprecated in 2019.10, in particular:
+    -   @cpp MAGNUM_BUILD_MULTITHREADED @ce, use
+        @ref CORRADE_BUILD_MULTITHREADED instead (i.e., the feature is now
+        enabled consistently between Corrade and Magnum)
     -   Templated @cpp Image*::data() @ce APIs returning a pointer which
         allowed for dangerous data access without any bounds, type or layout
         checks, use @ref Image::pixels() instead

src/Magnum/Magnum.h

@@ -126,14 +126,6 @@ Enabled by default in a static build. On Windows see also the
 #define MAGNUM_BUILD_STATIC_UNIQUE_GLOBALS
 #undef MAGNUM_BUILD_STATIC_UNIQUE_GLOBALS
 
-#ifdef MAGNUM_BUILD_DEPRECATED
-/** @brief Multi-threaded build
- * @m_deprecated_since{2019,10} Use @ref CORRADE_BUILD_MULTITHREADED instead.
- */
-#define MAGNUM_BUILD_MULTITHREADED
-#undef MAGNUM_BUILD_MULTITHREADED
-#endif
-
 /**
 @brief OpenGL interoperability
 

src/Magnum/configure.h.cmake

@@ -38,12 +38,6 @@
 
 #ifdef MAGNUM_BUILD_DEPRECATED
 #include "Corrade/configure.h"
-#ifdef CORRADE_BUILD_MULTITHREADED
-/* For compatibility only, to be removed at some point. Deliberate double space
-   after the #define to avoid being unconditionally matched by older FindMagnum
-   modules. */
-#define  MAGNUM_BUILD_MULTITHREADED
-#endif
 /* The following applies only to desktop platforms */
 #if !defined(CORRADE_TARGET_IOS) && !defined(CORRADE_TARGET_ANDROID) && !defined(CORRADE_TARGET_EMSCRIPTEN) && !defined(CORRADE_TARGET_WINDOWS_RT)
 /* MAGNUM_TARGET_HEADLESS used to be an option defined on desktop GL only, not