treewide: remove uses of doBuild and doConfigure

doBuild and doConfigure are not actually used by any builders, they were
probably added by mistake and just confuse people.

pkgs/applications/audio/spotify/default.nix

@@ -78,8 +78,6 @@ stdenv.mkDerivation {
 
   buildInputs = [ squashfsTools makeWrapper ];
 
-  doConfigure = false;
-  doBuild = false;
   dontStrip = true;
   dontPatchELF = true;
 

pkgs/applications/networking/cluster/kubectl/default.nix

@@ -9,8 +9,6 @@ stdenv.mkDerivation {
 
   outputs = [ "out" "man" ];
 
-  doBuild = false;
-
   installPhase = ''
     mkdir -p \
       "$out/bin" \

pkgs/applications/science/electronics/eagle/eagle.nix

@@ -36,9 +36,6 @@ let
         qtbase qtdeclarative qtsvg qtlocation qtwebchannel qtwebengine
       ];
 
-    doConfigure = false;
-    doBuild = false;
-
     installPhase = ''
       # Extract eagle tarball
       mkdir "$out"

pkgs/applications/virtualization/virtualbox/guest-additions/default.nix

@@ -56,8 +56,6 @@ stdenv.mkDerivation {
     }
   '';
 
-  doConfigure = false;
-
   buildPhase = ''
     # Build kernel modules.
     cd src

pkgs/servers/unifi/default.nix

@@ -19,8 +19,6 @@ let
       runHook postUnpack
     '';
 
-    doConfigure = false;
-
     installPhase = ''
       runHook preInstall
 

pkgs/servers/xmpp/pyIRCt/default.nix

@@ -15,7 +15,6 @@ stdenv.mkDerivation rec {
     xmpppy pythonIRClib
   ];
 
-  /* doConfigure should be removed if not needed */
   # phaseNames = ["deploy" (a.makeManyWrappers "$out/share/${name}/irc.py" a.pythonWrapperArguments)];
 
   installPhase = ''

pkgs/servers/xmpp/pyMAILt/default.nix

@@ -14,7 +14,6 @@ stdenv.mkDerivation rec {
   pythonPath = [ xmpppy ];
   buildInputs = [ pythonPackages.wrapPython ];
 
-  /* doConfigure should be removed if not needed */
   installPhase = ''
     cd mail-transport
     mkdir -p $out/bin $out/share/${pname}-${version}

pkgs/tools/admin/google-cloud-sdk/default.nix

@@ -36,8 +36,6 @@ in stdenv.mkDerivation rec {
 
   buildInputs = [ python makeWrapper ];
 
-  doBuild = false;
-
   patches = [
     ./gcloud-path.patch
   ];

pkgs/tools/text/shab/default.nix

@@ -19,7 +19,6 @@ let
       done
     '';
 
-    doBuild = false;
     doCheck = true;
     doInstallCheck = true;