Removed provisioning loop in unittests.

[ Merge of http://go/wvgerrit/98467 ]

The issue with intermediate provisioning request failures with the
development provisioning server has been resolved in b/139206968.

This change removes the provisioning retry loop which was a workaround
for the CDM unit tests.  Should the issue re-arise, it would be useful
to detect it in our unit tests.

Bug: 139361531
Test: Linux unit tests
Change-Id: Ib44c56c740efea562803d3f8f93ffd62bd95e485

libwvdrmengine/cdm/core/test/test_base.h

@@ -22,9 +22,6 @@ namespace wvcdm {
 // to configure OEMCrypto to use a test keybox.
 class WvCdmTestBase : public ::testing::Test {
  public:
-  // Default number of provisioning try attempts.
-  constexpr static size_t kDefaultMaxProvisioningAttempts = 10;
-
   WvCdmTestBase();
   ~WvCdmTestBase() override {}
   void SetUp() override;