hdf5: Revert to normal linker

.

Revert workaround for Sonoma/Xcode 15.0.
`ld_classic` is no longer needed with HDF5 1.14.3.
HDFGroup/hdf5#3571
HDFGroup/hdf5#3581
"Removed "-commons" linking option on Darwin"
https://github.com/HDFGroup/hdf5/blob/hdf5_1_14_3/release_docs/RELEASE.txt

science/hdf5/Portfile

@@ -72,16 +72,6 @@ configure.args \
                     --with-szlib=${prefix}/lib/libaec \
                     --with-zlib=yes
 
-if { [vercmp ${xcodeversion} >= 15.0] || [vercmp ${xcodecltversion} >= 15.0] } {
-    # On macOS13 and newer ensure the 'legacy' linker is used as GCC currently has problems
-    # with the new default linker in Xcode 15. See e.g.
-    # https://developer.apple.com/documentation/xcode-release-notes/xcode-15-release-notes#Linking
-    # https://discussions.apple.com/thread/255137447
-    # https://developer.apple.com/forums/thread/737707
-    # https://github.com/Homebrew/homebrew-core/issues/145991
-    configure.env   LDFLAGS=-ld_classic
-}
-
 # Actively checks how to get clang to warn on implicit functions with this.
 configure.checks.implicit_function_declaration.whitelist-append strchr