Remove dependencies section (#738)

Building the dependencies individually from what I understand is no longer supported, so best to just remove it from our readme to avoid confusion.

Author: KaibaLopez

README.md

@@ -56,56 +56,6 @@ __Jump To:__
    cmake <path-to-root-of-this-source-code> -G Xcode -DTARGET_ARCH="APPLE" -DCMAKE_BUILD_TYPE=Debug
    xcodebuild -target ALL_BUILD
    ```
-
-### Third party dependencies:
-Starting from version 1.7.0, we added several third party dependencies, including [`aws-c-common`](https://github.com/awslabs/aws-c-common), [`aws-checksums`](https://github.com/awslabs/aws-checksums) and [`aws-c-event-stream`](https://github.com/awslabs/aws-c-event-stream). By default, they will be built and installed in `<BUILD_DIR>/.deps/install`, and copied to default system directory during SDK installation. You can change the location by specifying `CMAKE_INSTALL_PREFIX`.
-
-However, if you want to build and install these libraries in custom locations:
-1. Download, build and install `aws-c-common`:
-   ```sh
-   git clone https://github.com/awslabs/aws-c-common
-   cd aws-c-common
-   # checkout to a specific commit id if you want.
-   git checkout <commit-id>
-   mkdir build && cd build
-   # without CMAKE_INSTALL_PREFIX, it will be installed to default system directory.
-   cmake .. -DCMAKE_INSTALL_PREFIX=<deps-install-dir> <extra-cmake-parameters-here>
-   make # or MSBuild ALL_BUILD.vcxproj on Windows
-   make install # or MSBuild INSTALL.vcxproj on Windows
-   ```
-2. Download, build and install `aws-checksums`:
-   ```sh
-   git clone https://github.com/awslabs/aws-checksums
-   cd aws-checksums
-   # checkout to a specific commit id if you want
-   git checkout <commit-id>
-   mkdir build && cd build
-   # without CMAKE_INSTALL_PREFIX, it will be installed to default system directory.
-   cmake .. -DCMAKE_INSTALL_PREFIX=<deps-install-dir> <extra-cmake-parameters-here>
-   make # or MSBuild ALL_BUILD.vcxproj on Windows
-   make install # or MSBuild INSTALL.vcxproj on Windows
-   ```
-3. Download, build and install `aws-c-event-stream`:
-   ```sh
-   git clone https://github.com/awslabs/aws-c-event-stream
-   cd aws-c-event-stream
-   # checkout to a specific commit id if you want
-   git checkout <commit-id>
-   mkdir build && cd build
-   # aws-c-common and aws-checksums are dependencies of aws-c-event-stream
-   # without CMAKE_INSTALL_PREFIX, it will be installed to default system directory.
-   cmake .. -DCMAKE_INSTALL_PREFIX=<deps-install-dir> -DCMAKE_PREFIX_PATH=<deps-install-dir> <extra-cmake-parameters-here>
-   make # or MSBuild ALL_BUILD.vcxproj on Windows
-   make install # or MSBuild INSTALL.vcxproj on Windows
-   ```
-4. Turn off `BUILD_DEPS` when building C++ SDK:
-   ```sh
-   cd BUILD_DIR
-   cmake <path-to-root-of-this-source-code> -DBUILD_DEPS=OFF -DCMAKE_PREFIX_PATH=<deps-install-dir>
-   ```
-You may also find the following link helpful for including the build in your project:
-https://aws.amazon.com/blogs/developer/using-cmake-exports-with-the-aws-sdk-for-c/
-
 #### Other Dependencies:
 To compile in Linux, you must have the header files for libcurl, libopenssl. The packages are typically available in your package manager.