Remove "gcc-libs" as dependencies

It is not necessary.
In MSYS2 that dependency was removed here:
  msys2/MINGW-packages@84abecc

Author: larskanis

mingw-w64-ruby-head/PKGBUILD

@@ -14,8 +14,7 @@ license=("BSD, custom")
 makedepends=("${MINGW_PACKAGE_PREFIX}-cc"
              "${MINGW_PACKAGE_PREFIX}-pkgconf"
              autoconf automake libtool patch make)
-depends=("${MINGW_PACKAGE_PREFIX}-gcc-libs"
-         "${MINGW_PACKAGE_PREFIX}-gmp"
+depends=("${MINGW_PACKAGE_PREFIX}-gmp"
          "${MINGW_PACKAGE_PREFIX}-libffi"
          "${MINGW_PACKAGE_PREFIX}-libyaml"
          "${MINGW_PACKAGE_PREFIX}-openssl>=3.0.0"

mingw-w64-ruby32/PKGBUILD

@@ -12,8 +12,7 @@ mingw_arch=('mingw32' 'ucrt64')
 url="https://www.ruby-lang.org/en"
 license=("BSD, custom")
 makedepends=("${MINGW_PACKAGE_PREFIX}-gcc" "${MINGW_PACKAGE_PREFIX}-pkg-config")
-depends=("${MINGW_PACKAGE_PREFIX}-gcc-libs"
-         "${MINGW_PACKAGE_PREFIX}-gmp"
+depends=("${MINGW_PACKAGE_PREFIX}-gmp"
          "${MINGW_PACKAGE_PREFIX}-libffi"
          "${MINGW_PACKAGE_PREFIX}-libyaml"
          "${MINGW_PACKAGE_PREFIX}-openssl>=3.0.0"

mingw-w64-ruby33/PKGBUILD

@@ -12,8 +12,7 @@ mingw_arch=('mingw32' 'ucrt64')
 url="https://www.ruby-lang.org/en"
 license=("BSD, custom")
 makedepends=("${MINGW_PACKAGE_PREFIX}-gcc" "${MINGW_PACKAGE_PREFIX}-pkg-config")
-depends=("${MINGW_PACKAGE_PREFIX}-gcc-libs"
-         "${MINGW_PACKAGE_PREFIX}-gmp"
+depends=("${MINGW_PACKAGE_PREFIX}-gmp"
          "${MINGW_PACKAGE_PREFIX}-libffi"
          "${MINGW_PACKAGE_PREFIX}-libyaml"
          "${MINGW_PACKAGE_PREFIX}-openssl>=3.0.0"