Remove all the things which are handled by AppImage builder now

dist_assets/linux/AppRun

@@ -1,19 +0,0 @@
-#! /bin/bash -i
-
-# Export APPRUN if running from an extracted image
-self="$(readlink -f -- $0)"
-here="${self%/*}"
-APPDIR="${APPDIR:-${here}}"
-
-# Export TCl/Tk
-export TCL_LIBRARY="${APPDIR}/usr/share/tcltk/tcl8.4"
-export TK_LIBRARY="${APPDIR}/usr/share/tcltk/tk8.4"
-export TKPATH="${TK_LIBRARY}"
-
-# Export SSL certificate
-export SSL_CERT_FILE="${APPDIR}/opt/_internal/certs.pem"
-
-# Call the entry point
-#! /bin/bash -i
-
-${APPDIR}/usr/bin/pyfa "$@"

dist_assets/linux/pyfa

@@ -1,3 +0,0 @@
-#! /bin/bash
-
-${APPDIR}/usr/bin/python3 -s "${APPDIR}/opt/pyfa/pyfa.py" "$@"

dist_assets/linux/pyfa.appdata.xml

@@ -1,17 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<component type="desktop-application">
-    <id>org.pyfa.pyfa</id>
-    <metadata_license>MIT</metadata_license>
-    <project_license>GPL-3</project_license>
-    <name>Pyfa</name>
-    <summary>Pyfa </summary>
-    <description>
-        <p>  Python Fitting Assitant for EVE Online
-        </p>
-    </description>
-    <launchable type="desktop-id">pyfa.desktop</launchable>
-    <url type="homepage">https://github.com/pyfa-org/Pyfa</url>
-    <provides>
-        <binary>pyfa</binary>
-    </provides>
-</component>

dist_assets/linux/pyfa.desktop

@@ -1,7 +0,0 @@
-[Desktop Entry]
-Type=Application
-Name=Pyfa
-Exec=pyfa
-Comment=Python Fitting Assistant for EVE: Online
-Icon=python
-Categories=Game;