Fix qbs warnings

Duplicate dependencies

Change-Id: I23e931cd6e75494a8ec7e099b0f2549764e5924b
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>

src/plugins/coreplugin/coreplugin.qbs

@@ -7,7 +7,7 @@ QtcPlugin {
     Depends {
         name: "Qt"
         submodules: [
-            "core", "widgets", "xml", "network", "script", "sql", "help", "printsupport"
+            "widgets", "xml", "network", "script", "sql", "help", "printsupport"
         ]
     }
     Depends { name: "Utils" }

src/plugins/debugger/debugger.qbs

@@ -263,7 +263,6 @@ QtcPlugin {
     }
 
     Export {
-        Depends { name: "cpp" }
         Depends { name: "QtcSsh" }
     }
 }

src/plugins/projectexplorer/projectexplorer.qbs

@@ -6,7 +6,7 @@ import "../QtcPlugin.qbs" as QtcPlugin
 QtcPlugin {
     name: "ProjectExplorer"
 
-    Depends { name: "Qt"; submodules: ["core", "widgets", "xml", "network", "script"] }
+    Depends { name: "Qt"; submodules: ["widgets", "xml", "network", "script"] }
     Depends { name: "Qt.quick"; condition: QtcFunctions.versionIsAtLeast(Qt.core.version, "5.1"); }
     Depends { name: "Core" }
     Depends { name: "Locator" }

src/plugins/qtsupport/qtsupport.qbs

@@ -6,7 +6,7 @@ import "../QtcPlugin.qbs" as QtcPlugin
 QtcPlugin {
     name: "QtSupport"
 
-    Depends { name: "Qt"; submodules: ["core", "widgets"]; }
+    Depends { name: "Qt"; submodules: ["widgets"]; }
     Depends { name: "Qt.quick"; condition: QtcFunctions.versionIsAtLeast(Qt.core.version, "5.1"); }
     Depends { name: "Core" }
     Depends { name: "ProjectExplorer" }
@@ -123,7 +123,6 @@ QtcPlugin {
 
 
     Export {
-        Depends { name: "cpp" }
         cpp.includePaths: "../../shared"
         cpp.defines: [
             "QMAKE_AS_LIBRARY",