doc-rst: pixfmt-yvyu: remove an empty column

The conversion added an empty column (probably, it was used on
DocBook just to increase spacing.

Remove it.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

Documentation/linux_tv/media/v4l/pixfmt-yvyu.rst

@@ -24,8 +24,6 @@ half the horizontal resolution of the Y component.
 
 Each cell is one byte.
 
-
-
 .. flat-table::
     :header-rows:  0
     :stub-columns: 0
@@ -115,8 +113,6 @@ Each cell is one byte.
 
 **Color Sample Location..**
 
-
-
 .. flat-table::
     :header-rows:  0
     :stub-columns: 0
@@ -130,7 +126,6 @@ Each cell is one byte.
        -  
        -  1
 
-       -  
        -  2
 
        -  
@@ -146,7 +141,6 @@ Each cell is one byte.
 
        -  Y
 
-       -  
        -  Y
 
        -  C
@@ -163,7 +157,6 @@ Each cell is one byte.
 
        -  Y
 
-       -  
        -  Y
 
        -  C
@@ -180,7 +173,6 @@ Each cell is one byte.
 
        -  Y
 
-       -  
        -  Y
 
        -  C
@@ -197,7 +189,6 @@ Each cell is one byte.
 
        -  Y
 
-       -  
        -  Y
 
        -  C