[librsvg/cargo-c] Revert "win32: Bring back the librsvg.symbols"

[Federico Mena Quintero <federico src gnome org>]

commit 2b9779a191d2cbc3e33a57a621b20f7e3e9f66c9
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Fri Jul 9 16:07:58 2021 +0800

    Revert "win32: Bring back the librsvg.symbols"
    
    Since symbol export is now handled by cargo-c, we can drop the
    librsvg.symbols file, again, since it is no longer used.
    
    This reverts commit 869fbf5949283f86762949c7cb989eee6470d6dd.

 win32/Makefile.am     |  1 -
 win32/librsvg.symbols | 58 ---------------------------------------------------
 2 files changed, 59 deletions(-)
---
diff --git a/win32/Makefile.am b/win32/Makefile.am
index 8e31f91a..c3067577 100644
--- a/win32/Makefile.am
+++ b/win32/Makefile.am
@@ -11,7 +11,6 @@ EXTRA_DIST = \
        info-msvc.mak           \
        install-msvc.mak        \
        introspection-msvc.mak  \
-       librsvg.symbols \
        Makefile.vc             \
        README.txt              \
        rsvg-rust.mak           \