macaulay2: Drop allow-older-gfan.patch

Now that gfan 0.8beta is available, then we can just depend on it
rather than patching out the check for it.  (Furthermore, we'll
actually need it soon as the gfanInterface package is being updated to
add 0.8-only features.)

Author: d-torrance

repos/spack_repo/builtin/packages/macaulay2/allow-older-gfan.patch

@@ -74,14 +74,12 @@ class Macaulay2(AutotoolsPackage):
     depends_on("cohomcalg", type=("build", "run"))
     depends_on("csdp", type=("build", "run"))
     depends_on("gfan", type=("build", "run"))
+    depends_on("gfan@0.8beta:", type=("build", "run"), when="@1.26.06:")
     depends_on("lrslib", type=("build", "run"))
     depends_on("msolve", type=("build", "run"))
     depends_on("nauty", type=("build", "run"))
     depends_on("topcom", type=("build", "run"))
 
-    # drop minimum version of gfan (0.8 can't be built w/ older compilers)
-    patch("allow-older-gfan.patch", when="@1.26.06")
-
     configure_directory = "M2"
 
     def configure_args(self) -> List[str]: