Revert "flounder_defconfig: Enable CONFIG_MMC_SIMULATE_MAX_SPEED"

This reverts commit 021ec0b1e4b0a826809b3fa6390036ff86514dc3.

Bug: 29389829
Change-Id: Ib391b7df7060411c461d8fe7ca91c9e8c73e93fd
diff --git a/arch/arm64/configs/flounder_defconfig b/arch/arm64/configs/flounder_defconfig
index 26e1e48..8178f8a 100644
--- a/arch/arm64/configs/flounder_defconfig
+++ b/arch/arm64/configs/flounder_defconfig
@@ -516,7 +516,6 @@
 CONFIG_MMC_UNSAFE_RESUME=y
 CONFIG_MMC_BLOCK_MINORS=16
 CONFIG_MMC_TEST=y
-CONFIG_MMC_SIMULATE_MAX_SPEED=y
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_PLTFM=y
 CONFIG_MMC_SDHCI_TEGRA=y