corechecks: Remove GetApiVersion helper

Change-Id: I5530276233d46ac6002ad7d0c4edd9c404fbf565
diff --git a/layers/buffer_validation.cpp b/layers/buffer_validation.cpp
index e52c9cb..870aa45 100644
--- a/layers/buffer_validation.cpp
+++ b/layers/buffer_validation.cpp
@@ -1617,7 +1617,7 @@
         skip |= ValidateCmdQueueFlags(cb_node, "vkCmdClearColorImage()", VK_QUEUE_GRAPHICS_BIT | VK_QUEUE_COMPUTE_BIT,
                                       "VUID-vkCmdClearColorImage-commandBuffer-cmdpool");
         skip |= ValidateCmd(cb_node, CMD_CLEARCOLORIMAGE, "vkCmdClearColorImage()");
-        if (GetApiVersion() >= VK_API_VERSION_1_1 || device_extensions.vk_khr_maintenance1) {
+        if (api_version >= VK_API_VERSION_1_1 || device_extensions.vk_khr_maintenance1) {
             skip |=
                 ValidateImageFormatFeatureFlags(image_state, VK_FORMAT_FEATURE_TRANSFER_DST_BIT, "vkCmdClearColorImage",
                                                 "VUID-vkCmdClearColorImage-image-01993", "VUID-vkCmdClearColorImage-image-01993");
@@ -1660,7 +1660,7 @@
         skip |= ValidateCmdQueueFlags(cb_node, "vkCmdClearDepthStencilImage()", VK_QUEUE_GRAPHICS_BIT,
                                       "VUID-vkCmdClearDepthStencilImage-commandBuffer-cmdpool");
         skip |= ValidateCmd(cb_node, CMD_CLEARDEPTHSTENCILIMAGE, "vkCmdClearDepthStencilImage()");
-        if (GetApiVersion() >= VK_API_VERSION_1_1 || device_extensions.vk_khr_maintenance1) {
+        if (api_version >= VK_API_VERSION_1_1 || device_extensions.vk_khr_maintenance1) {
             skip |= ValidateImageFormatFeatureFlags(image_state, VK_FORMAT_FEATURE_TRANSFER_DST_BIT, "vkCmdClearDepthStencilImage",
                                                     "VUID-vkCmdClearDepthStencilImage-image-01994",
                                                     "VUID-vkCmdClearDepthStencilImage-image-01994");
@@ -2597,7 +2597,7 @@
                                     "vkCmdCopyImage()", "VK_IMAGE_USAGE_TRANSFER_SRC_BIT");
     skip |= ValidateImageUsageFlags(dst_image_state, VK_IMAGE_USAGE_TRANSFER_DST_BIT, true, "VUID-vkCmdCopyImage-dstImage-00131",
                                     "vkCmdCopyImage()", "VK_IMAGE_USAGE_TRANSFER_DST_BIT");
-    if (GetApiVersion() >= VK_API_VERSION_1_1 || device_extensions.vk_khr_maintenance1) {
+    if (api_version >= VK_API_VERSION_1_1 || device_extensions.vk_khr_maintenance1) {
         skip |= ValidateImageFormatFeatureFlags(src_image_state, VK_FORMAT_FEATURE_TRANSFER_SRC_BIT, "vkCmdCopyImage()",
                                                 "VUID-vkCmdCopyImage-srcImage-01995", "VUID-vkCmdCopyImage-srcImage-01995");
         skip |= ValidateImageFormatFeatureFlags(dst_image_state, VK_FORMAT_FEATURE_TRANSFER_DST_BIT, "vkCmdCopyImage()",
@@ -4762,7 +4762,7 @@
     skip |= ValidateBufferUsageFlags(dst_buffer_state, VK_BUFFER_USAGE_TRANSFER_DST_BIT, true,
                                      "VUID-vkCmdCopyImageToBuffer-dstBuffer-00191", "vkCmdCopyImageToBuffer()",
                                      "VK_BUFFER_USAGE_TRANSFER_DST_BIT");
-    if (GetApiVersion() >= VK_API_VERSION_1_1 || device_extensions.vk_khr_maintenance1) {
+    if (api_version >= VK_API_VERSION_1_1 || device_extensions.vk_khr_maintenance1) {
         skip |= ValidateImageFormatFeatureFlags(src_image_state, VK_FORMAT_FEATURE_TRANSFER_SRC_BIT, "vkCmdCopyImageToBuffer()",
                                                 "VUID-vkCmdCopyImageToBuffer-srcImage-01998",
                                                 "VUID-vkCmdCopyImageToBuffer-srcImage-01998");
@@ -4841,7 +4841,7 @@
     skip |= ValidateImageUsageFlags(dst_image_state, VK_IMAGE_USAGE_TRANSFER_DST_BIT, true,
                                     "VUID-vkCmdCopyBufferToImage-dstImage-00177", "vkCmdCopyBufferToImage()",
                                     "VK_IMAGE_USAGE_TRANSFER_DST_BIT");
-    if (GetApiVersion() >= VK_API_VERSION_1_1 || device_extensions.vk_khr_maintenance1) {
+    if (api_version >= VK_API_VERSION_1_1 || device_extensions.vk_khr_maintenance1) {
         skip |= ValidateImageFormatFeatureFlags(dst_image_state, VK_FORMAT_FEATURE_TRANSFER_DST_BIT, "vkCmdCopyBufferToImage()",
                                                 "VUID-vkCmdCopyBufferToImage-dstImage-01997",
                                                 "VUID-vkCmdCopyBufferToImage-dstImage-01997");