appimage: Remove `run_appimage.sh` as it is no longer needed

The functionality of setting up the data directory and starting mongodb
is now handled in python code.

appimage/AppRun

@@ -25,5 +25,5 @@ do
     fi
 done
 
-(PYTHONHOME="${APPDIR}/opt/python3.7" exec "/bin/bash" "${APPDIR}/usr/src/monkey_island/linux/run_appimage.sh")
+(PYTHONHOME="${APPDIR}/opt/python3.7" exec "${APPDIR}/opt/python3.7/bin/python3.7" "${APPDIR}/usr/src/monkey_island.py" $@)
 exit "$?"

appimage/build_appimage.sh

@@ -165,7 +165,6 @@ copy_monkey_island_to_appdir() {
   cp "$1"/monkey_island.py "$INSTALL_DIR"
   cp -r "$1"/common "$INSTALL_DIR/"
   cp -r "$1"/monkey_island "$INSTALL_DIR/"
-  cp ./run_appimage.sh "$INSTALL_DIR"/monkey_island/linux/
   cp ./server_config.json.standard "$INSTALL_DIR"/monkey_island/cc/
 
   # TODO: This is a workaround that may be able to be removed after PR #848 is

appimage/run_appimage.sh

@@ -1,14 +0,0 @@
-#!/bin/bash
-
-PYTHON_CMD="$APPDIR"/opt/python3.7/bin/python3.7
-DOT_MONKEY="$HOME"/.monkey_island/
-
-# shellcheck disable=SC2174
-mkdir --mode=0700 --parents "$DOT_MONKEY"
-
-DB_DIR="$DOT_MONKEY"/db
-mkdir --parents "$DB_DIR"
-
-cd "$APPDIR"/usr/src || exit 1
-./monkey_island/bin/mongodb/bin/mongod --dbpath "$DB_DIR" &
-${PYTHON_CMD} ./monkey_island.py --server-config "$DOT_MONKEY"/server_config.json