Put brave old bb10 platform to a well-deserved rest

Add some 🔥 to appease @reduz. Fixes #8692.

doc/base/classes.xml

@@ -26264,7 +26264,7 @@
 			<return type="String">
 			</return>
 			<description>
-				Return the name of the host OS. Possible values are: "Android", "BlackBerry 10", "Flash", "Haiku", "iOS", "HTML5", "OSX", "Server", "Windows", "UWP", "X11"
+				Return the name of the host OS. Possible values are: "Android", "Haiku", "iOS", "HTML5", "OSX", "Server", "Windows", "UWP", "X11".
 			</description>
 		</method>
 		<method name="get_power_percent_left">

modules/gdnative/gdnative.cpp

@@ -515,7 +515,6 @@ static const char *_dl_platforms_info[] = {
 	"unix|x11|so|X11",
 	"unix|server|so|Server",
 	"unix|android|so|Android",
-	"unix|blackberry|so|Blackberry 10",
 	"unix|haiku|so|Haiku", // Right?
 	"|mac|dynlib|Mac",
 	"mac|ios|dynlib|iOS",

modules/webm/libvpx/SCsub

@@ -273,7 +273,7 @@ else:
         webm_cpu_x86 = True
     else:
         webm_cpu_x86 = not is_x11_or_server_arm and (cpu_bits == '32' or cpu_bits == '64') and (env["platform"] == 'windows' or env["platform"] == 'x11' or env["platform"] == 'osx' or env["platform"] == 'haiku' or is_android_x86 or is_ios_x86)
-        webm_cpu_arm = is_x11_or_server_arm or (not is_ios_x86 and env["platform"] == 'iphone') or env["platform"] == 'bb10' or (not is_android_x86 and env["platform"] == 'android')
+        webm_cpu_arm = is_x11_or_server_arm or (not is_ios_x86 and env["platform"] == 'iphone') or (not is_android_x86 and env["platform"] == 'android')
 
 if webm_cpu_x86:
     import subprocess