Stop enabling shiftround; it breaks indent/outdent

The shiftround setting breaks many common cases of multi-line indent and
outdent for continuation lines. For example, suppose I have the
following code, in a buffer with 8-space indentation:

foo(x,
    y)

With the default settings, I can > those two lines, and end up with this:

        foo(x,
            y);

But with shiftround, I instead end up with:

        foo(x,
        y);

Thus, revert to the vim default of noshiftround.

plugin/sensible.vim

@@ -23,7 +23,6 @@ set complete-=i
 set smarttab
 
 set nrformats-=octal
-set shiftround
 
 set ttimeout
 set ttimeoutlen=100