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

This reverts commit 9b420cc.

Author: hartwork

.github/workflows/linux_and_macos.yml

@@ -129,6 +129,9 @@ jobs:
             popd
           done
 
+          ls -l libvisual-plugins/m4/
+          ls -l libvisual-plugins/m4/alsa.m4  # i.e. fail CI unless created
+
       - name: '[LV] Run "./configure" (from Git)'
         run: |-
           cd libvisual

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