Clean up CSS validator errors: 'Property align doesn't exist : center'

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55885 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/LangRef.html b/docs/LangRef.html
index 63bcbf6..8994a35 100644
--- a/docs/LangRef.html
+++ b/docs/LangRef.html
@@ -2611,7 +2611,7 @@
 <h5>Semantics:</h5>
 <p>The truth table used for the '<tt>and</tt>' instruction is:</p>
 <p> </p>
-<div style="align: center">
+<div>
 <table border="1" cellspacing="0" cellpadding="4">
   <tbody>
     <tr>
@@ -2666,7 +2666,7 @@
 <h5>Semantics:</h5>
 <p>The truth table used for the '<tt>or</tt>' instruction is:</p>
 <p> </p>
-<div style="align: center">
+<div>
 <table border="1" cellspacing="0" cellpadding="4">
   <tbody>
     <tr>
@@ -2723,7 +2723,7 @@
 
 <p>The truth table used for the '<tt>xor</tt>' instruction is:</p>
 <p> </p>
-<div style="align: center">
+<div>
 <table border="1" cellspacing="0" cellpadding="4">
   <tbody>
     <tr>