remove codec-only references from TODO

Author: tmatth

TODO

@@ -9,10 +9,6 @@ Major points:
 - Better error reporting
 - Make kiss-fft 32-bit safe
 
-Minor issues:
-- Fix last frame of speexenc
-
-
 Post 1.2:
 improve float<->int conversion
 split encoder and decoder?
@@ -23,12 +19,8 @@ Do VAD properly
 
 Optimisations
 - Add restrict in a few places?
-- enable 4x4 version of pitch_xcorr() at least on some archs?
 - use __builtin_expect() (likely()/unlikely())
 
-Would be nice:
-Implement wideband split as IIR instead of QMF?
-
 Allocator override (speex_lib_ctl?)
 Fixed-point:
   - VBR
@@ -38,11 +30,3 @@ Denoiser:
   - Better noise adaptation
 AGC:
   - Use median filtering instead of "non-linear mean"?
-
-Standards
--Complete Speex RTP profile
--MIME type registration
-
-ideas:
-Peelable stream (double codebook, higher bands, stereo)
-LPC from spectral domain