Remove un-needed `requests` dependency and remove pins (#2083)

* Remove un-needed `requests` dependency and remove pins

Signed-off-by: Gaurav Gupta <gaugup@microsoft.com>

* Update requirements-dev.txt to put back pin for rai_core_flask

---------

Signed-off-by: Gaurav Gupta <gaugup@microsoft.com>

erroranalysis/requirements-dev.txt

@@ -1,7 +1,6 @@
 pytest==7.0.1
 pytest-cov
 pytest-mock==3.6.1
-requests==2.25.1
 
 requirements-parser==0.2.0
 rai_test_utils==0.2.0

rai_test_utils/requirements-dev.txt

@@ -1,7 +1,6 @@
 pytest==7.0.1
 pytest-cov
 pytest-mock==3.6.1
-requests==2.25.1
 
 requirements-parser==0.2.0
 

raiutils/requirements-dev.txt

@@ -1,7 +1,6 @@
 pytest==7.0.1
 pytest-cov
 pytest-mock==3.6.1
-requests==2.25.1
 
 requirements-parser==0.2.0
 

raiwidgets/requirements-dev.txt

@@ -3,7 +3,6 @@
 pytest==7.0.1
 pytest-cov
 pytest-mock==3.6.1
-requests==2.25.1
 
 requirements-parser==0.2.0