cpprest: bump version to 2.10.6, drop clang 747 patch: upstream

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-support/cpprest/cpprest-2.10.5/747.patch

@@ -1,13 +0,0 @@
-Description: fix for upstream issue 747, clang 6 build error
-Forwarded: https://github.com/Microsoft/cpprestsdk/pull/844
-From: rozhuk-im
---- a/Release/include/pplx/pplxlinux.h	2018-04-29 16:22:39.927675000 +0300
-+++ b/Release/include/pplx/pplxlinux.h	2018-04-29 16:22:57.809537000 +0300
-@@ -240,6 +240,7 @@
-     {
-     public:
-         _PPLXIMP virtual void schedule( TaskProc_t proc, _In_ void* param);
-+    virtual ~linux_scheduler() {}
-     };
- 
- } // namespace details

meta-oe/recipes-support/cpprest/cpprest_2.10.6.bb

@@ -9,12 +9,11 @@ SRC_URI = "git://github.com/Microsoft/cpprestsdk.git;protocol=https;branch=maste
            file://disable-outside-tests.patch \
            file://disable-test-timeouts.patch \
            file://disable-float-tests.patch \
-           file://747.patch \
            file://845.patch \
            "
 
-# tag 2.10.5
-SRCREV= "25d6b26f7038eeec3b51e2e0a70960a8e34fcd68"
+# tag 2.10.6
+SRCREV= "66e50f02dde92f802bbd3a8d79c6352954665b9b"
 
 S = "${WORKDIR}/git"