docs(plat): remove TC1 entry from the deprecation table

Since the TC1 platform has been eliminated from the TF-A source code
and CI script repository, updated the deprecation table to remove its
entry.

Change-Id: I93ae03e1f810666e9a6d0c6172a322ff1e960c71
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
diff --git a/docs/plat/index.rst b/docs/plat/index.rst
index f5c1566..12afa44 100644
--- a/docs/plat/index.rst
+++ b/docs/plat/index.rst
@@ -74,8 +74,6 @@
 +----------------+----------------+--------------------+--------------------+
 |    rdn1edge    |      Arm       |        2.8         |       TBD          |
 +----------------+----------------+--------------------+--------------------+
-|    tc1         |      Arm       |        2.10        |       TBD          |
-+----------------+----------------+--------------------+--------------------+
 
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