Make static code analysis go through again

pmb/install/blockdevice.py

@@ -23,7 +23,6 @@ import pmb.helpers.mount
 import pmb.install.losetup
 import pmb.helpers.cli
 import pmb.config
-import fnmatch
 
 
 def mount_sdcard(args):

pmb/install/partition.py

@@ -39,8 +39,8 @@ def partitions_mount(args):
     if not partition_prefix:
         raise RuntimeError("Unable to find the partition prefix,"
                            " expected the first partition of " +
-                           prefix + " to be located at " + prefix
-                           + "1 or " + prefix + "p1!")
+                           prefix + " to be located at " + prefix +
+                           "1 or " + prefix + "p1!")
 
     for i in [1, 2]:
         source = prefix + partition_prefix + str(i)