remove pointless code path

there is no need to consider the "-framework foo" syntax, as we fully
control the list and insert elements exclusively as "-framework" "foo" a
few lines down.

Change-Id: I95fa8b46f53673ea3df1a67a2a44d11f7d679cc6
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>

qmake/generators/unix/unixmake.cpp

@@ -582,19 +582,11 @@ UnixMakefileGenerator::processPrlFiles()
                         }
                         bool found = false;
                         for(int x = 0; x < lflags[arch].size(); ++x) {
-                            ProString xf = lflags[arch].at(x);
+                            if (lflags[arch].at(x) == "-framework" && lflags[arch].at(++x) == opt) {
-                            if(xf.startsWith("-framework")) {
-                                ProString framework;
-                                if(xf.length() > 11)
-                                    framework = xf.mid(11);
-                                else
-                                    framework = lflags[arch].at(++x);
-                                if(framework == opt) {
                                 found = true;
                                 break;
                             }
                         }
-                        }
                         if(!found) {
                             lflags[arch].append("-framework");
                             lflags[arch].append(opt);