Remove fetchMD5warn

Deprecation warnings should not be used in Nixpkgs because they spam
innocent "nix-env -qa" users with (in this case) dozens of messages
that they can't do anything about.

This also reverts commit 2ca8833383.

lib/trivial.nix

@@ -138,7 +138,4 @@ rec {
   */
   warn = msg: builtins.trace "WARNING: ${msg}";
   info = msg: builtins.trace "INFO: ${msg}";
-
-  fetchMD5warn = name: context : data : info
-    "Deprecated use of MD5 hash in ${name} to fetch ${context}" data;
 }

pkgs/build-support/fetchdarcs/default.nix

@@ -7,8 +7,7 @@ stdenv.mkDerivation {
 
   outputHashAlgo = if sha256 == "" then "md5" else "sha256";
   outputHashMode = "recursive";
-  outputHash = if sha256 == "" then
-    (stdenv.lib.fetchMD5warn "fetchdarcs" url md5) else sha256;
+  outputHash = if sha256 == "" then md5 else sha256;
   
   inherit url rev context;
 }

pkgs/build-support/fetchegg/default.nix

@@ -11,8 +11,7 @@ stdenv.mkDerivation {
 
   outputHashAlgo = if sha256 == "" then "md5" else "sha256";
   outputHashMode = "recursive";
-  outputHash = if sha256 == "" then
-    (stdenv.lib.fetchMD5warn "fetchegg" name md5) else sha256;
+  outputHash = if sha256 == "" then md5 else sha256;
 
   inherit version;
 

pkgs/build-support/fetchgit/default.nix

@@ -50,8 +50,7 @@ stdenv.mkDerivation {
 
   outputHashAlgo = if sha256 == "" then "md5" else "sha256";
   outputHashMode = "recursive";
-  outputHash = if sha256 == "" then
-    (stdenv.lib.fetchMD5warn "fetchgit" url md5) else sha256;
+  outputHash = if sha256 == "" then md5 else sha256;
 
   inherit url rev leaveDotGit fetchSubmodules deepClone branchName;
 

pkgs/build-support/fetchhg/default.nix

@@ -15,8 +15,7 @@ stdenv.mkDerivation {
 
   outputHashAlgo = if md5 != null then "md5" else "sha256";
   outputHashMode = "recursive";
-  outputHash = if md5 != null then
-    (stdenv.lib.fetchMD5warn "fetchhg" url md5) else sha256;
+  outputHash = if md5 != null then md5 else sha256;
 
   inherit url rev;
   preferLocalBuild = true;

pkgs/build-support/fetchsvn/default.nix

@@ -29,8 +29,7 @@ stdenv.mkDerivation {
 
   outputHashAlgo = if sha256 == "" then "md5" else "sha256";
   outputHashMode = "recursive";
-  outputHash = if sha256 == "" then
-    (stdenv.lib.fetchMD5warn "fetchsvn" url md5) else sha256;
+  outputHash = if sha256 == "" then md5 else sha256;
   
   inherit url rev sshSupport openssh ignoreExternals;
 

pkgs/build-support/fetchsvnssh/default.nix

@@ -8,8 +8,7 @@ stdenv.mkDerivation {
 
   outputHashAlgo = if sha256 == "" then "md5" else "sha256";
   outputHashMode = "recursive";
-  outputHash = if sha256 == "" then
-    (stdenv.lib.fetchMD5warn "fetchsvnssh" url md5) else sha256;
+  outputHash = if sha256 == "" then md5 else sha256;
   
   sshSubversion = ./sshsubversion.exp;
   

pkgs/build-support/fetchurl/default.nix

@@ -112,8 +112,7 @@ if (!hasHash) then throw "Specify hash for fetchurl fixed-output derivation: ${s
   outputHashAlgo = if outputHashAlgo != "" then outputHashAlgo else
       if sha512 != "" then "sha512" else if sha256 != "" then "sha256" else if sha1 != "" then "sha1" else "md5";
   outputHash = if outputHash != "" then outputHash else
-      if sha512 != "" then sha512 else if sha256 != "" then sha256 else if sha1 != "" then sha1 else
-        (stdenv.lib.fetchMD5warn "fetchurl" (builtins.head urls_) md5);
+      if sha512 != "" then sha512 else if sha256 != "" then sha256 else if sha1 != "" then sha1 else md5;
 
   outputHashMode = if (recursiveHash || executable) then "recursive" else "flat";
 

pkgs/top-level/make-tarball.nix

@@ -63,15 +63,12 @@ releaseTools.sourceTarball rec {
     fi
 
     # Check that all-packages.nix evaluates on a number of platforms without any warnings.
-    # Filter out MD5 warnings for now
     for platform in i686-linux x86_64-linux x86_64-darwin; do
         header "checking Nixpkgs on $platform"
 
         NIXPKGS_ALLOW_BROKEN=1 nix-env -f . \
             --show-trace --argstr system "$platform" \
-            -qa --drv-path --system-filter \* --system 2>&1 >/dev/null |
-            (grep -v '^trace: INFO: Deprecated use of MD5 hash in fetch' || true) |
-            tee eval-warnings.log
+            -qa --drv-path --system-filter \* --system 2>&1 >/dev/null | tee eval-warnings.log
 
         if [ -s eval-warnings.log ]; then
             echo "Nixpkgs on $platform evaluated with warnings, aborting"