font-patcher: Fix ligature removal

[why]
Only one tables is removed, even if we want to remove more.

With 0a480bb the indentation of the code has changed, and now the loop
is (apart from printing) empty. See also #934

[how]
Re-indent the lines to restore functionality as originally forseen with
commit 557fc00.

Reported-by: Rádler Ákos <akos.radler@gmail.com>
Signed-off-by: Fini Jastrow <ulf.fini.jastrow@desy.de>

font-patcher

@@ -667,11 +667,11 @@ class font_patcher:
                 ligature_subtables = json.loads(self.config.get("Subtables", "ligatures"))
                 for subtable in ligature_subtables:
                     print("Removing subtable:", subtable)
-                try:
-                    self.sourceFont.removeLookupSubtable(subtable)
-                    print("Successfully removed subtable:", subtable)
-                except Exception:
-                    print("Failed to remove subtable:", subtable)
+                    try:
+                        self.sourceFont.removeLookupSubtable(subtable)
+                        print("Successfully removed subtable:", subtable)
+                    except Exception:
+                        print("Failed to remove subtable:", subtable)
         elif self.args.removeligatures:
             print("Unable to read configfile, unable to remove ligatures")
         else: