(#21339) mpfr: cleanup patches

they were introduced in #14687 but never applied

also, use more compact archives

identified by #21146
and https://ericlemanissier.github.io/conan-center-lint-conandata/

recipes/mpfr/all/conandata.yml

@@ -1,16 +1,16 @@
 sources:
   "4.2.1":
-    url: "https://ftp.gnu.org/gnu/mpfr/mpfr-4.2.1.tar.gz"
-    sha256: "116715552bd966c85b417c424db1bbdf639f53836eb361549d1f8d6ded5cb4c6"
+    url: "https://ftp.gnu.org/gnu/mpfr/mpfr-4.2.1.tar.xz"
+    sha256: "277807353a6726978996945af13e52829e3abd7a9a5b7fb2793894e18f1fcbb2"
   "4.2.0":
-    url: "https://ftp.gnu.org/gnu/mpfr/mpfr-4.2.0.tar.gz"
-    sha256: "f1cc1c6bb14d18f0c61cc416e083f5e697b6e0e3cf9630b9b33e8e483fc960f0"
+    url: "https://ftp.gnu.org/gnu/mpfr/mpfr-4.2.0.tar.xz"
+    sha256: "06a378df13501248c1b2db5aa977a2c8126ae849a9d9b7be2546fb4a9c26d993"
   "4.1.0":
-    url: "https://ftp.gnu.org/gnu/mpfr/mpfr-4.1.0.tar.gz"
-    sha256: "3127fe813218f3a1f0adf4e8899de23df33b4cf4b4b3831a5314f78e65ffa2d6"
+    url: "https://ftp.gnu.org/gnu/mpfr/mpfr-4.1.0.tar.xz"
+    sha256: "0c98a3f1732ff6ca4ea690552079da9c597872d30e96ec28414ee23c95558a7f"
   "4.0.2":
-    url: "https://ftp.gnu.org/gnu/mpfr/mpfr-4.0.2.tar.gz"
-    sha256: "ae26cace63a498f07047a784cd3b0e4d010b44d2b193bab82af693de57a19a78"
+    url: "https://ftp.gnu.org/gnu/mpfr/mpfr-4.0.2.tar.xz"
+    sha256: "1d3be708604eae0e42d578ba93b390c2a145f17743a744d8f3f8c2ad5855a38a"
 patches:
   "4.2.1":
     - patch_file: "patches/4.2.0-0002-windows-header-dll.patch"