qtbase: Drop dont-process configure option

* it was removed completely in 5.4 with:
commit b7d86139772c3ce662ea7f092658699d351bbb1d
Author: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Date:   Thu Jun 19 11:46:10 2014 +0200

    nuke -process/-fully-process/-dont-process options

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

recipes-qt/qt5/nativesdk-qtbase.inc

@@ -142,7 +142,6 @@ do_configure() {
     fi
 
     ${S}/configure -v \
-        -dont-process \
         -opensource -confirm-license \
         -sysroot ${STAGING_DIR_NATIVE} \
         -no-gcc-sysroot \

recipes-qt/qt5/qtbase-native.inc

@@ -34,7 +34,6 @@ do_generate_qt_config_file() {
 }
 
 EXTRA_OECONF = " \
-    -dont-process \
     -prefix ${prefix} \
     -sysroot ${STAGING_DIR_NATIVE} \
     -no-gcc-sysroot \

recipes-qt/qt5/qtbase.inc

@@ -168,7 +168,6 @@ do_configure() {
     fi
 
     ${S}/configure -v \
-        -dont-process \
         -opensource -confirm-license \
         -sysroot ${STAGING_DIR_TARGET} \
         -no-gcc-sysroot \