Fix qdoc warnings from removed enum values

Change-Id: Icd7a941ed1d8c7a4674482ace4b280a15e592c1a
Reviewed-by: Paul Wicking <paul.wicking@qt.io>

src/corelib/global/qnamespace.qdoc

@@ -1287,7 +1287,6 @@
     \omitvalue WA_WState_ExplicitShowHide
     \omitvalue WA_InputMethodTransparent
     \omitvalue WA_DropSiteRegistered
-    \omitvalue WA_ForceAcceptDrops
     \omitvalue WA_NoX11EventCompression
     \omitvalue WA_TintedBackground
     \omitvalue WA_X11OpenGLOverlay

src/corelib/text/qregularexpression.cpp

@@ -608,16 +608,6 @@ QT_BEGIN_NAMESPACE
         \c{\w} to match any character with either the Unicode L (letter) or N
         (digit) property, plus underscore, and so on. This option corresponds
         to the \c{/u} modifier in Perl regular expressions.
-
-    \value OptimizeOnFirstUsageOption
-        This option is ignored. A regular expression is automatically optimized
-        (including JIT compiling) the first time it is used. This enum value
-        was introduced in Qt 5.4.
-
-    \value DontAutomaticallyOptimizeOption
-        This option is ignored. A regular expression is automatically optimized
-        (including JIT compiling) the first time it is used. This enum value
-        was introduced in Qt 5.4.
 */
 
 /*!