Require XCB 1.10

We need XCB 1.10 for sync to work. Sync was optional with a version check
to make it work on build.kde.org. The CI system supports XCB 1.10 now, so
it's better to have it as a mandatory requirement.

CMakeLists.txt

@@ -182,7 +182,7 @@ set_package_properties(X11 PROPERTIES DESCRIPTION "X11 libraries"
                     )
 
 # All the required XCB components
-find_package(XCB
+find_package(XCB 1.10
     REQUIRED COMPONENTS
         XCB
         XFIXES
@@ -208,12 +208,6 @@ if (XCB_ICCCM_VERSION VERSION_LESS "0.4")
 endif()
 add_feature_info("XCB-ICCCM" XCB_ICCCM_FOUND "Required for building test applications for KWin")
 
-set(HAVE_XCB_SYNC TRUE)
-if (XCB_VERSION VERSION_LESS "1.10")
-    set(HAVE_XCB_SYNC FALSE)
-endif()
-add_feature_info("XCB-SYNC" HAVE_XCB_SYNC "XCB Sync version >= 1.10 required for synced window resizing")
-
 find_package(X11_XCB)
 set_package_properties(X11_XCB PROPERTIES
                        PURPOSE "Required for OpenGL support in X11 windowed backend of kwin_wayland"

client.cpp

@@ -1782,7 +1782,6 @@ void Client::getIcons()
 
 void Client::getSyncCounter()
 {
-#if HAVE_XCB_SYNC
     if (!Xcb::Extensions::self()->isSyncAvailable())
         return;
 
@@ -1818,7 +1817,6 @@ void Client::getSyncCounter()
             }
         }
     }
-#endif
 }
 
 /**

config-kwin.h.cmake

@@ -12,7 +12,6 @@
 #cmakedefine01 HAVE_WAYLAND_CURSOR
 #cmakedefine01 HAVE_XKB
 #cmakedefine01 HAVE_INPUT
-#cmakedefine01 HAVE_XCB_SYNC
 #cmakedefine01 HAVE_X11_XCB
 #cmakedefine01 HAVE_DRM
 #cmakedefine01 HAVE_GBM

workspace.cpp

@@ -1382,12 +1382,6 @@ QString Workspace::supportInformation() const
     support.append(yes);
 #else
     support.append(no);
-#endif
-    support.append(QStringLiteral("HAVE_XCB_SYNC: "));
-#if HAVE_XCB_SYNC
-    support.append(yes);
-#else
-    support.append(no);
 #endif
     support.append(QStringLiteral("HAVE_X11_XCB: "));
 #if HAVE_X11_XCB