Fix `make style-check` errors (#1000)

Using flake8 inplace of pyflakes
Renamed run-pyflakes -> run-flake8
Changed target name to flake8 in Makefile

With pyflakes we can't suppress warnings/errors in few required places.
flake8 is flexible in that regard. Hence using flake8 seems to be a
better choice here.

flake8 does the job of pep8 anyway.
So, removed pep8 target from Makefile along with tools/run-pep8 script.

Included setup.py in flake8 checks

2 files changed, 2 insertions, 23 deletions

diff --git a/tools/run-pyflakes b/tools/run-flake8
index 179afebe..0021cdb9 100755
--- a/tools/run-pyflakes
+++ b/tools/run-flake8
@@ -2,7 +2,7 @@
 
 CR="
 "
-pycheck_dirs=( "cloudinit/" "tests/" "tools/" )
+pycheck_dirs=( "cloudinit/" "tests/" "tools/"  "setup.py" )
 
 set -f
 if [ $# -eq 0 ]; then
@@ -11,7 +11,7 @@ else
    files=( "$@" )
 fi
 
-cmd=( "python3" -m "pyflakes" "${files[@]}" )
+cmd=( "python3" -m "flake8" "${files[@]}" )
 
 echo "Running: " "${cmd[@]}" 1>&2
 exec "${cmd[@]}"
diff --git a/tools/run-pep8 b/tools/run-pep8
deleted file mode 100755
index 4bd0bbfb..00000000
--- a/tools/run-pep8
+++ /dev/null
@@ -1,21 +0,0 @@
-#!/bin/bash
-
-pycheck_dirs=( "cloudinit/" "tests/" "tools/" )
-
-CR="
-"
-[ "$1" = "-v" ] && { verbose="$1"; shift; } || verbose=""
-
-set -f
-if [ $# -eq 0 ]; then unset IFS
-   IFS="$CR"
-   files=( "${bin_files[@]}" "${pycheck_dirs[@]}" )
-   unset IFS
-else
-   files=( "$@" )
-fi
-
-myname=${0##*/}
-cmd=( "${myname#run-}" $verbose "${files[@]}" )
-echo "Running: " "${cmd[@]}" 1>&2
-exec "${cmd[@]}"