Fix compilation on latest nightly

[Techcable]

The ability for plugins to add MIR passes was removed as of 4ca9c97.
Luckily, we don't use this feature at all and can safely ignore it.

Fixes #1618

Although it successfully lints itself and several other projects, it doesn't pass the tests because the compiler keeps panicking 🙄

[oli-obk]

That's weird. Dogfood fails on appveyor but not on travis

error: adding items after statements is confusing, since items exist from the start of the scope
   --> clippy_lints/src\assign_ops.rs:130:25
    |
130 |                         macro_rules! ops {
    |                         ^
    |
    = note: `-D items-after-statements` implied by `-D clippy-pedantic`
    = help: for further information visit https://github.com/Manishearth/rust-clippy/wiki#items_after_statements
error: adding items after statements is confusing, since items exist from the start of the scope
   --> clippy_lints/src\doc.rs:246:5
    |
246 |     macro_rules! check_block {
    |     ^
    |
    = note: `-D items-after-statements` implied by `-D clippy-pedantic`
    = help: for further information visit https://github.com/Manishearth/rust-clippy/wiki#items_after_statements
error: aborting due to 2 previous errors

[oli-obk]

Anyway... macro_rules! is order dependent within statements. So we should fix that lint.

[oli-obk]

macro_rules breakage from rust-lang/rust#40220

Still no idea why travis works... I reran it to check whether it has an outdated rustc, but it worked fine all over again...

[oli-obk]

Thanks! publishing now

[pwrdwnsys]

v0.0.119 compiled successfully on macOS with rustc 1.17.0-nightly (824c9eb 2017-03-12)