Move @typescript-eslint/no-namespace to disabled list

[jakebailey]

This rule fires for these:

/home/jabaile/work/TypeScript/src/compiler/core.ts
  1882:41  error  Unexpected empty function 'noop'        @typescript-eslint/no-empty-function
  2706:43  error  Unexpected empty function 'assertType'  @typescript-eslint/no-empty-function

/home/jabaile/work/TypeScript/src/compiler/debug.ts
  358:43  error  Unexpected empty function 'type'  @typescript-eslint/no-empty-function

/home/jabaile/work/TypeScript/src/testRunner/unittests/evaluation/esDecorators.ts
   741:65  error  Unexpected empty method 'method'   @typescript-eslint/no-empty-function
   768:44  error  Unexpected empty method 'method'   @typescript-eslint/no-empty-function
   785:76  error  Unexpected empty method '#method'  @typescript-eslint/no-empty-function
  1139:70  error  Unexpected empty arrow function    @typescript-eslint/no-empty-function
  1189:70  error  Unexpected empty arrow function    @typescript-eslint/no-empty-function
  1270:70  error  Unexpected empty arrow function    @typescript-eslint/no-empty-function
  1351:70  error  Unexpected empty arrow function    @typescript-eslint/no-empty-function
  1432:70  error  Unexpected empty arrow function    @typescript-eslint/no-empty-function
  1513:70  error  Unexpected empty arrow function    @typescript-eslint/no-empty-function

✖ 12 problems (12 errors, 0 warnings)

The first three are functions which are canonically empty (which we'd exempt). It's possible that we'd always use noop when we wanted an empty function, so it would seem like this rule is fine to keep things consistent.

However, the last file's errors are in a test which checks that the shape of things is correct, such that it's not really a problem that they are empty, but there's no way we could use noop to achieve the same goals, only throw or something to say "this is intentionally empty".

I'm not sure if this rule gets us much; if anything it'd just be an annoyance in the editor when we are working on the code, similarly to my thoughts on no-empty-interface.

[jakebailey]

I mistitled the PR... Was supposed to be no empty function. Ugh.