2to3:

* add fixes
* pyqt fixer: include some QtSql symbols and remove imports
  which only symbol was removed (eg. SIGNAL)

scripts/qgis_fixes/fix_pyqt.py

@@ -344,6 +344,18 @@ MAPPING = {
             "QSvgGenerator"
         ]),
     ],
+    "PyQt4.QtSql": [
+        ("PyQt.QtSql", [
+            "QSqlDatabase",
+            "QSqlQuery",
+            "QSqlField"
+        ]),
+    ],
+    "PyQt4.uic": [
+        ("PyQt.uic", [
+            "loadUiType",
+        ]),
+    ],
     "PyQt4": [
         ("PyQt", [
             "QtCore",
@@ -451,6 +463,8 @@ class FixPyqt(FixImports):
                 mod_member.replace(Name(new_name, prefix=pref))
             elif new_name == '':
                 self.cannot_convert(node, "This is an invalid module element")
+            else:
+                node.remove()
 
         # Multiple members being imported
         else: