DOC: fix duplicates in release

Author: adamklein

RELEASE.rst

@@ -187,9 +187,6 @@ pandas 0.7.0
   - Prototypes for some vectorized string functions
   - Add float64 hash table to solve the Series.unique problem with NAs (GH #714)
   - Memoize objects when reading from file to reduce memory footprint
-  - Improved handling of NAs in binary ops with object Series (GH #737)
-  - Added optimized Cython groupby routines for aggregating 2D blocks, added
-    vbenchmark, (GH #745)
 
 **Bug fixes**
 
@@ -273,7 +270,7 @@ pandas 0.7.0
   - Use right dropna function for SparseSeries. Return dense Series for NA fill
     value (GH #730)
   - Fix Index.format bug causing incorrectly string-formatted Series with
-    datetime indexes (# 758)
+    datetime indexes (# 726, 758)
   - Fix errors caused by object dtype arrays passed to ols (GH #759)
   - Fix error where column names lost when passing list of labels to
     DataFrame.__getitem__, (GH #662)
@@ -286,7 +283,6 @@ pandas 0.7.0
   - Fix csv encoding when using unicode (GH #705, #717, #738)
   - Fix assumption that each object contains every unique block type in concat,
     (GH #708)
-  - Fix handling of NAs in Series.unique (GH #714)
   - Fix sortedness check of multiindex in to_panel (GH #719, 720)
   - Fix that None was not treated as NA in PyObjectHashtable
   - Fix hashing dtype because of endianness confusion (GH #747, #748)
@@ -296,10 +292,8 @@ pandas 0.7.0
     yields numeric array, (GH #753)
   - Fixes and improvements to DataFrame.rank (GH #742)
   - Fix catching AttributeError instead of NameError for bottleneck
-  - Fix to float formatting issues (GH #726, 758)
   - Try to cast non-MultiIndex to better dtype when calling reset_index (GH #726
     #440)
-  - Fix object dtype arrays in OLS class (GH #759)
   - Fix #1.QNAN0' float bug on 2.6/win64
   - Allow subclasses of dicts in DataFrame constructor, with tests
   - Fix problem whereby set_index destroys column multiindex (GH #764)