Remove unused file, fix unicode error, add syntax checking for all files

.travis.yml

@@ -21,4 +21,5 @@ before_script:
   - isort --check-only --diff pwndbg
 script:
   - nosetests ./tests/
-  - python -m py_compile ida_script.py
+  - python2.7 -m py_compile ida_script.py $(git ls-files 'pwndbg/*.py')
+  - python3   -m py_compile               $(git ls-files 'pwndbg/*.py')

pwndbg/commands/elf.py

@@ -27,11 +27,11 @@ def elfheader():
                 continue
 
             size = section['sh_size']
-            sections.append((start, start + size, section.name.decode('ascii')))
+            sections.append((start, start + size, section.name))
 
         sections.sort()
         for start, end, name in sections:
-            print('%#x - %#x %s' % (start, end, name))
+            print('%#x - %#x ' % (start, end), name)
 
 @pwndbg.commands.Command
 def gotplt():

pwndbg/commands/packing.py

@@ -1,8 +0,0 @@
-from __future__ import print_function
-
-import struct
-
-import gdb
-
-
-def pack(data, size=None):