[REVERT ME] libvisual-plugins: Drop "--install" from ACLOCAL_AMFLAGS

This reverts commit 9b420cc.

Author: hartwork

.github/workflows/linux_and_macos.yml

@@ -128,6 +128,7 @@ jobs:
               NOCONFIGURE=please ./autogen.sh
             popd
           done
+          ls -l libvisual-plugins/m4/alsa.m4  # i.e. fail CI unless created
 
       - name: '[LV] Run "./configure" (from Git)'
         run: |-

libvisual-plugins/Makefile.am

@@ -1,6 +1,6 @@
 ## Process this file with automake to generate a Makefile.in
 
-ACLOCAL_AMFLAGS = -I m4 --install
+ACLOCAL_AMFLAGS = -I m4
 
 SUBDIRS = plugins po