Trying to speed up appveyor build

Author: Alan Jeffrey

appveyor.yml

@@ -26,9 +26,6 @@ environment:
     C:\\Program Files\\Git\\cmd;\
     C:\\Program Files\\Git\\usr\\bin;\
     C:\\Program Files\\AppVeyor\\BuildAgent;"
-  matrix:
-    - CARGO_OPTS: ""
-    - CARGO_OPTS: "--release"
 
 # Uncomment to enable RDP & wait for exit.  Connection info will be printed in the log.
 #init:
@@ -51,10 +48,9 @@ install:
   - set AUTOCONF=C:/mozilla-build/msys/local/bin/autoconf-2.13
   - rustc -vV
   - cargo -vV
-  - cargo install rustfmt-nightly --root C:\rust
 
 build_script:
   - echo PATH %PATH%
   - echo VSINSTALLDIR %VSINSTALLDIR%
   - echo MOZTOOLS_PATH %MOZTOOLS_PATH%
-  - cd %APPVEYOR_BUILD_FOLDER% && cargo build --verbose --verbose %CARGO_OPTS% && cargo test %CARGO_OPTS%
+  - cd %APPVEYOR_BUILD_FOLDER% && cargo build --verbose --verbose && cargo test