DOC: Duplicate Entry of Series.replace
#### Location of the 

https://pandas.pydata.org/pandas-docs/stable/reference/series.html

#### Documentation problem

There are two entries of `Series.replace`. One in the [Missing Data Handling](https://pandas.pydata.org/pandas-docs/stable/reference/series.html#missing-data-handling) and another one in [Combining-Comparing-Joining-Merging](https://pandas.pydata.org/pandas-docs/stable/reference/series.html#combining-comparing-joining-merging)

#### Suggested fix for documentation
Remove the entry from Combining, comparing, joining, merging
