Remove a long and now outdated comment.

anntzer · anntzer · commit d19ca0270fd5 · 2018-01-26T23:26:12.000-08:00
AFAICT backend_ps + usetex is perfectly happy to output to an in-memory
buffer, as shown by
```
from pylab import *
from io import BytesIO
rcParams["text.usetex"] = True
xlabel("hello")
ylabel("$world$")
buf = BytesIO()
savefig(buf, format="eps", bbox_inches="tight")
print(buf.getvalue())
buf = BytesIO()
savefig(buf, format="ps", bbox_inches="tight")
print(buf.getvalue())
```
diff --git a/lib/matplotlib/backend_bases.py b/lib/matplotlib/backend_bases.py
@@ -2199,16 +2199,9 @@ def print_figure(self, filename, dpi=None, facecolor=None, edgecolor=None,
         if bbox_inches:
             # call adjust_bbox to save only the given area
             if bbox_inches == "tight":
-                # when bbox_inches == "tight", it saves the figure
-                # twice. The first save command is just to estimate
-                # the bounding box of the figure. A stringIO object is
-                # used as a temporary file object, but it causes a
-                # problem for some backends (ps backend with
-                # usetex=True) if they expect a filename, not a
-                # file-like object. As I think it is best to change
-                # the backend to support file-like object, i'm going
-                # to leave it as it is. However, a better solution
-                # than stringIO seems to be needed. -JJL
+                # When bbox_inches == "tight", it saves the figure twice.  The
+                # first save command (to a BytesIO) is just to estimate the
+                # bounding box of the figure.
                 result = print_method(
                     io.BytesIO(),
                     dpi=dpi,
